Ball non-return valve

Abstract

In the valve according to the invention the supporting blind ( 6 ) of the deflected channel ( 5 ) is terminated at its free ends with the oblique surfaces ( 10 ), and the guiding rail ( 7 ) of the ball ( 4 ) is terminated with the supporting directional arrangement ( 8 ) directing the ball ( 4 ) toward the supporting blind ( 6 ) of the deflected channel ( 5 ), and the top ( 9 ), which is positioned closer to the valve outlet than to the inlet, and together with the oblique surfaces ( 10 ) of the supporting blind ( 6 ) of the deflected channel ( 5 ) produce a slot ( 11 ) widening itself to the direction of deflected channel ( 5 ) interior.

The invention claimed is: 
     
       1. A ball non-return valve comprising:
 a) a ball ( 4 ), and 
 b) a casing ( 1 ) comprising
 i) a flow-through channel with an outlet and an inlet terminated with a ring seat into which the ball ( 4 ) is settled when in the closed position, 
 ii) a deflected channel ( 5 ) greater in diameter than the ball into which the ball is placed when in the open position, 
 iii) a ball guiding rail ( 7 ) formed by two symmetrical internal bulges of the casing wall, wherein the ball guiding rail is positioned in a central part of the casing between the inlet and the outlet and extending from a junction of the flow-through channel and the deflected channel toward the outlet, 
 iv) an external bulge of the casing wall protruding to the direction opposite the ball when in the fully open position, 
 v) a supporting blind ( 6 ) terminated at its free ends with oblique surfaces ( 10 ) and positioned in the deflected channel, wherein the supporting blind settles the ball in the deflected channel in the fully open position, and 
 vi) a supporting directional arrangement ( 8 ) extending from the ball guiding rail ( 7 ) and having a top ( 9 ) which is positioned closer to the valve outlet than to the inlet, wherein the supporting directional arrangement ( 8 ) directs the ball ( 4 ) toward the supporting blind ( 6 ) of the deflected channel ( 5 ), and wherein the supporting directional arrangement ( 8 ) together with the oblique surfaces ( 10 ) of the supporting blind ( 6 ) of the deflected channel ( 5 ) produces a slot ( 11 ) widening itself to the direction of the deflected channel ( 5 ) interior, and wherein the supporting directional arrangement ( 8 ) and the supporting blind ( 6 ) together are capable of contacting the ball at more than three points when the ball is in the fully open position. 
 
 
     
     
       2. The valve according to  claim 1  wherein the acute angle (β) is enclosed between an edge of the supporting directional arrangement ( 8 ) and a straight line conducted in parallel to a straight line running through the centre of the ball ( 4 ) when the ball is in the fully open position and perpendicularly to the axis of the flowing space of the central part of the flow-through channel ( 2 ) is 35°-90°. 
     
     
       3. The valve according to  claim 2 , wherein the acute angle (β) is 45°-80°. 
     
     
       4. The valve according to  claim 1 , wherein the casing ( 1 ) further comprises a cover ( 13 ) having a flange, and wherein the free ends of the supporting blind ( 6 ) provided with the oblique surfaces ( 10 ) or ends of the supporting directional arrangement ( 8 ), terminated with tops ( 9 ), stick out beyond the outline of the flange. 
     
     
       5. The valve according to  claim 4  wherein the cover ( 13 ) is provided at least with one ear ( 14 ), at one side of the casing ( 1 ), having a riser ( 15 ) entering a hollow ( 16 ) in the casing ( 1 ). 
     
     
       6. The valve according to  claim 1  wherein the supporting blind ( 6 ) is provided, at its central part, with a rinsing groove ( 17 ). 
     
     
       7. The valve according to  claim 1  wherein the casing ( 1 ) is provided with at least two pairs of attachments ( 18 ) for fastening inside them a blocking component ( 19 ), that is inserted between the attachments ( 18 ) and a flange ( 20 ) of a cover ( 13 ) after having a gasket ( 21 ) depressed by the flange ( 20 ). 
     
     
       8. The valve according to  claim 7  wherein there are incisions ( 22 ) in the flange ( 20 ) of the cover ( 13 ). 
     
     
       9. The valve according to  claim 7  wherein there is an opening ( 24 ) at least in one attachment ( 18 ), into which a cotter pin ( 23 ) is inserted, that is conducted also through the blocking component ( 19 ). 
     
     
       10. The valve according to  claim 1  wherein the ball ( 4 ) is made with a solid core of a rubber-like resin or with a metallic core covered with a rubber-like resin and joined by means of a layer of a cementing material with a rubber cover of reduced hardness. 
     
     
       11. The valve according to  claim 1  wherein the ball ( 4 ) in the fully open position is able to deflect freely, perpendicularly to the axis of a flowing space in the central part of the flow-through channel, by a quantity of the clearance (L) between the edge of the supporting directional arrangement ( 8 ) and the trajectory ( 12 ) of the ball ( 4 ) rolling along this edge, that amounts from 1% to 10% of the quantity of the ball ( 4 ) diameter. 
     
     
       12. The valve according to  claim 1 , wherein the casing is made of spheroidal cast iron, grey cast iron, or plastic. 
     
     
       13. The valve according to  claim 1 , wherein the casing is in angle configuration. 
     
     
       14. The valve according to  claim 1 , wherein the casing is in line configuration.